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RESEARCH PAPERS

Simplified Inelastic Analysis in Helical Coil Heat Exchanger Design

[+] Author and Article Information
C. E. Richard

General Atomic Company, P.O. Box 81608, San Diego, CA 92138

J. Eng. Power 102(3), 558-562 (Jul 01, 1980) (5 pages) doi:10.1115/1.3230301 History: Received March 26, 1979; Online September 28, 2009

Abstract

A simplified, inelastic analysis of helical coil tubing for high-temperature applications is described. Elastically calculated operating stresses are compared with inelastic estimates of allowable cyclic creep/fatigue stresses. The technique of simplifying and analyzing the operating cycles to determine acceptable creep damage levels has general application. The allowable stresses represent the greatest uncertainty in the method, and tests are required to improve their accuracy. A method of utilizing short-time test data to determine allowable stresses for reactor lifetimes of 30 to 40 years is proposed.

Copyright © 1980 by ASME
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